Clean up and switch to java 11

Author: Anadroid

core/src/processing/core/PApplet.java

@@ -1723,7 +1723,6 @@ public void beginContour() {
    * @webref shape:vertex
    * @webBrief Stops recording vertices for the shape.
    */
-   */
   public void endContour() {
     showMissingWarning("endContour");
   }